upgrade: adopt V8.31.1 (theme 1.3/1.4 redesigns, editor deep-canvas, guided launch, component library)

Overlay 190 upstream items (V8.22→8.31) preserving trade-pro theme,
registry tests, and design docs. Re-applied full patch set on identical
anchors (discovery/env_for/blocks.css/type-mapping/locale-override/
theme_color/frontend entries/test_theme_pro_v3 mods) plus compose pins.

Verified: theme suites 35/35; dual-baseline full run 415 passed vs
pristine 386+29 ours, FAILED-set diff EMPTY (same 10 Windows env fails).
Live: container 8.31.1-dev.1 healthy, hesupipe 192 entries intact,
trade-pro build 203 pages 0 errors.

Co-Authored-By: Claude Code <noreply@anthropic.com>

examples/v830-built-sites/industrial/siteforge-report.json

@@ -0,0 +1,27 @@
+{
+  "site": "ARC INDUSTRIES",
+  "locale": "zh-CN",
+  "alternate_pages": 0,
+  "version": "4b3630e1dc81",
+  "pages": 36,
+  "theme": "industrial",
+  "theme_version": "1.3.0",
+  "warnings": [],
+  "errors": [],
+  "external_assets": [],
+  "missing_local_images": [],
+  "broken_links": [],
+  "legacy_links": [],
+  "canonical_mismatches": [],
+  "slashless_routes": [],
+  "redirects": 0,
+  "mirrored_images": 0,
+  "quality_status": "passed",
+  "blueprint_blocks": 0,
+  "commercial_readiness": {
+    "ready_for_review": true,
+    "commercially_certified": false,
+    "blockers": 0,
+    "warnings": 5
+  }
+}